package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dao.DishDao;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishDao, Dish> implements DishService {

    //口味表注入
    @Autowired
    private DishFlavorService dishFlavorService;
    //添加菜品
    @Override
    @Transactional//因为操作多张表，所以需要开启事务管理
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        //获取菜品的id
        Long id = dishDto.getId();
        //菜品取口味信息
        List<DishFlavor> flavors = dishDto.getFlavors();
        //菜品味信息
        flavors = flavors.stream().map((item) -> {
            item.setDishId(id);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表
        dishFlavorService.saveBatch(flavors);
    }

    //根据id查询菜品信息喝对应 的口味信息
    @Override
    @Transactional
    public DishDto getByIdwithFlavor(Long id) {
       //查询菜品信息，根据dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish!=null,DishFlavor::getDishId,dish.getCategoryId());
        List<DishFlavor> list = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(list);
        return dishDto;
    }

    //更新菜品表
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }
}
